Improving the aerodynamic characteristics of the drying process based on the local approach
DOI:
https://doi.org/10.31548/energiya2022.02.039Abstract
In modern conditions, energy-saving technologies are widely used in various technological processes, including drying processes. Energy saving is achieved in various ways, including through the recycling of waste from the original product, in particular, dried plant waste.
The object of this study is the coolant supply system of the installation for drying and technological conditioning of plant waste.
The purpose of the work is to develop methods for improving the aerodynamic characteristics of the coolant supply system based on local control of thermophysical parameters in characteristic zones of the working environment.
Physical modeling is a traditional method used in IET NAS of Ukraine to study the transfer processes typical for heat power equipment.
The research was carried out in a specially made experimental sample of the installation, which completely reproduces the operating conditions of the full-scale installation in terms of geometric parameters and air supply system. The main difference was that the experiments were performed without heating the coolant (air) and using a fixed working line. The material to be dried was placed on a horizontal working line in the form of a thin layer and was blown by vertical air jets.
To assess the uniformity of the velocity field, the hot-wire method of measurements was used. Simultaneously with the values of the time-averaged velocity, the method makes it possible to determine the value of longitudinal fluctuations, which have a significant effect on the intensity of heat and mass transfer processes.
Based on the local control of the measurement results in the characteristic zones of the working space of the installation, measures were developed aimed at improving the uniformity of the flow velocity fields due to design changes in the air supply system. When performing the work, eight modifications were implemented, differing both in design features and for information received.
Because of the measures taken to improve the aerodynamic characteristics of the coolant supply system, it was possible to achieve optimal values of the average velocity and its non-uniformity coefficient, which ensure the required quality of material processing.
Key words: improved coolant supply system, local aerodynamic characteristics
References
Suprun, T. T. (2021). Local approach for evaluating heat transfer of prismatic elements on a flat surface. Eurasian Physical Technical Journal, 18/ 3 (37), 43-47. DOI 10.31489/2021No3/43-47 https://up.ksu.kz/phtj/2021_19_1_37/7.pdf
Suprun, T. T. (2017). Physical modeling the unsteady flow with wakes. Eurasian Physical Technical Journal, 14/2(28), 113 - 119. http://phtj.ksu.kz/files_phtj/2018.01/19.pdf
Bingxing, Wang, Zhixue, Liu, Bo, Zhang, Zhaodong, Wang, Guodong, Wang. (2019). Heat Transfer Characteristic of Slit Nozzle Impingement on High-temperature Plate Surface. ISIJ International, 59/5, 900-907 DOI https://doi.org/10.2355/isijinternational.ISIJINT-2018-576
Dyban, Ye.P., Mazur, A.I. (1982). Konvektivnyy teploobmen pri struynom obtekanii tel [Convective heat transfer in jet stream flow of bodies]. Kyiv: Naukova dumka, 303.
Bredshou, P. (1974). Vvedeniye v turbulentnost' i yeye izmereniye. [Introduction to turbulence and its measurement]. Moskow: Mir, 345.
Epik, E. Ya., Suprun, T. T. (2007). Impulse and heat transport processes at bypass transition. Eurasian Physical Technical Journal, 4/1(7), 52-57.
Downloads
Published
Issue
Section
License
Relationship between right holders and users shall be governed by the terms of the license Creative Commons Attribution – non-commercial – Distribution On Same Conditions 4.0 international (CC BY-NC-SA 4.0):https://creativecommons.org/licenses/by-nc-sa/4.0/deed.uk
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
